产品名称：通讯板产品规格：CB2/CB22/CB5/CB55/CB25/CBE产品编号：FBs-CB21个RS232(Port2)之扩充通讯板FBs-CB222个RS232(Port1+Port2)之扩充通讯板FBs-CB51个RS485(Port2)之扩充通讯板FBs-CB552个RS485(Port1+Port2)之扩充通讯板FBs-CB251个RS232(Port1)+1个RS485(Port2)之扩充通讯板FBs-CBE1个以太(Ethernet)网络界面(Port1)之扩充通讯板)